Papers by Keyword: Intermetallide

Abstract: On the basis of the discovered phenomenon of phase and structure formation of metallic materials being electrodeposited through a stage of liquid state it was predicted and experimentally proved the following: a) formation of intermediate phases in the form of intermetallides in electrodeposited metallic alloys during the electrochemical crystallization of a liquid phase of two metals of different valences; b) formation of intermediate phases with complex crystal lattices in the form of carbides during solidification of a liquid phase of a transition metal alloyed with carbon; and c) formation of eutectics in electrodeposited metallic alloys as a result of decomposition of a liquid phase into two separate solid phases during its solidification. Intermetallides Cu5Zn8 and Cu6Sn5 in electrodeposited alloys of Cu-Zn and Cu-Sn systems, carbides Fe3C and Cr3C2 in electrodeposited iron and chromium alloyed with carbon, and eutectics in electrodeposited alloys of Sn-Zn and Pb-Cu systems were found.

Abstract: The peculiarities of diffusion process and changes of long and short order parameters at an elastic and plastic deformation of compression and tension near grain boundaries with disorientation axis <111> are studied by the method of molecular dynamics. Whirl displacements of atoms destroying the order near grain boundary superdislocations are noticed at uniaxial deformation of compression. The fracture of superstructural and structural order at uniaxial deformation is accompanied by the deformation of amorphous area. Interdiffusion mechanism is changed in the dependence on deformation, temperature and boundary types.